-40,-20,-10,1,0.1,0.01,0.01,0.001,0.0001,0.00001有什么规律

-40,-20,-10,1,0.1,0.01,0.01,0.001,0.0001,0.00001有什么规律

题目
-40,-20,-10,1,0.1,0.01,0.01,0.001,0.0001,0.00001有什么规律
答案
等比数列,(n+1)项/n项=1/2
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